Manufacture of compositions, preparations, or articles having a basis of cellulose acetate



uNirEDisTTES PATENT OFFICE...

. may DREYFUS, or `LoNDoN, ENGLND.

MANUFACTUBE or coms, REPARATIONS, on'aarrcnns- HAVING A BAsIsor 1 v .ciaznmrnosn Acn'rn'rn.

1,353,385.. l I No Drawing; i

5 new and useful Improvements in or Relatingy to the Manufacture of Compositions, Preparations, or Articles Having a Basis of Cellulose Acetate, of which the following is a specification. Y

In the specification of another application for U. S. A. Patent S; No. 290,316 filed Apr. 15, 1919, I have described a process for theQmanufacture of non-infiammable Celluloid, films, dopes, artificial silk or other compositions, preparations or articles having a basis :o fV cellulose acetate, said process being characterized by the employment of certain special plastic-inducing solvents therein specified, namely, mixtures of isoi. Y ethylsulfonamids, made from crude or commercial 4xylene,jthe said1 substances representing l'I nixlmres of the isomeric alkylated amids .(-of o, m and p-xylene sulfonic'acids) such as' can-be obtained by treating an ordinary commercial; xyl'eneV (which distils for example about 1359 to1146 C. and as is well- 'knowncontains.o, m land'pfxylenes) by the ordinary gimathodsof` conversion into the alkylesulfonamids, for exampleby treating the crude xylene .with f chlorosulfonic acid to the corresponding sulfochloridsand solvents or plastic-inducing agents 'areffset out. These are 'shortly that such agents should have high' boiling points, 'for instance above 300 C.; thatthey should. not

be solid bodies at ordinary temperaturet most, that they should befitrue solvents of cellulose acetate, be`insoluble"or veryv little soluble in water, neutral and`.not liablejo water.

Accordin y. to invention Ijem meric vxylenemonomethylsulfonamids, mixtheii with -ammonia'to convert rthese into the` said specification the conditions which should be fulfilled by highynboiling become acid or alkatine byvboilingifwith:

' ploy A asf-fp 'astio-inducing agents for.l the.4

55 manufacture. of uninlammable Celluloid,

Specition 0f Letters Patent'. Patented'Sept. 21; 1920. ./Applieation led April 15, 1919. lSerial No. 290,317.

films, dopes, or any otherA compositions of' matter as before referred to, high boiling Aortho and para toluenemonomethylsulfona mid-containing mixtures or ortho and para t o luene monoefthylsulfonamid containing mixtures such as can be obtained on treat` ing crude or commercial toluene (which dist1ls for example about 95 to 132 C.) by

the ordinary methods of conversionvinto the alkyl sulfonamids, for. example by treating the crude toluene with chlorosulfonic acid v'to form ,the corresponding sulfochlorids,

treating the resulting raw mixture with amf monia to convert the sulfochlorids into sulfonamids, and then methylating or ethylating to the monomethyl or monoethyl stage;

or by treating the said raw mixture'with amins' such as methylamin, ethylamin, etc.

dungen, Teil I, 1074) and are unsuitable for i the purposes o fthe invention.

The aforesaid plasticsinducing agents of the present invention, representing mixtures containing o and p-toluene mono-methyl or monoethyl sulfonamids, which sulfonamids lare hereinafter in theiclaiming clauses rel ferred to as oand 'p toluene mono-low-car bon alkyl sulfonamids,"a're`both liqnidsub? stances at ordinary temperature,having high .boiling points and .-whiclifulfl the requlrements 'before mentioned. Naturally any mixtures of= them can' be employed or mixtures of them with'other plastic-inducing bodies nd the claims are to be read accordingly.4 -v

The plastic-inducing agen-ts o-f the'fpresent inventionv are preferably employed in conjunction with any usual or suitable solvents or liquids of lowboiling point for effecting the mixture of the mass or com# position -to be worked or'iproduced; as for example acetone, methyl or ethyl"v acetate and alcohol ortheir mixtures. v

Triphenylrphosphate, tricresylphosphate or similarlyracting agents may be employed in conjunction with th'e Aplastic-inducing agents for further reducing combustibility as referred to in my said specification.'

Likewise I may employv in conjunction ylwith' the plastic'indueing agent With or without the triphenylor tricresylphosphate. or similarly acting substancesaliphatic derivatives of urea which are either liquid r have a W melting point, such `as monomethylurea, dimethylurea, trimethylurea, monoethylurea, diethylurea and so fort-h, for the purpose of neutralizing any trace of acid which may be develo ed in the mass, composition or product. tives may be employed in the quantities usual for urea.

Naturally in making the solutions, masses or mixtures with rthe solvent plastic inducing agents of the present invention any usual or suitable substances maybe added.

What I claim and desire to secure by Letters Patent is:

uch urea derival. A composition of matter containing cellulose acetate and, containing a high-boiling mixture comprising orthoand paratoluene low carbon alkzyl sulfenamids, Which mixture is liquid at ordinary temperature. v

2. A composition of matter containing cellulose acetate and, containing a highboiling mixture comprising ortho and para toluene monoethylsulfonamids, which mixture is liquid at ordinary temperature.

In testimony Whereor` I have hereunto subscribed my name.

HENRY DREYFUS. 

